Code Sample #4

//               Course:  CS2400-60 Computer Science 2
//                 Name:  Abdalkarim, Marina
//           Assignment:  Programming Assignment P4.1
//               Remark:  The program tests all functions.
#include <iostream>
#include <string>
using namespace std;
struct stuRec		// creates a new record “data type named "stuRec"
{
	string name;	// 1st  data member  of stuRec type
	int credits;	// 2nd data member of stuRec type
	double gpa;	// 3rd data member of stuRec type
};
void fillRec(stuRec &sobj);
// Precondition: a stuRec record (or object) sobj is passed to the function by reference (must!) user is prompted to enter name, credits completed, and GPA for the student
// Postcondition: stuRec record referenced by sobj is filled or loaded with three values entered by the user
void display(stuRec &sobj);
// Postcondition: contents of sobj is displayed (the format can be found in the sample output below)
void sortByName(stuRec s[], int n);
// Precondition: an array of n student records is passed to the function; array is fully loaded with data
// Postcondition: n records have been sorted by name alphabetically
void sortByGPA(stuRec s[], int n);
// Postcondition: n records have been sorted by GPA in descending order
void swap(stuRec &s1, stuRec &s2);
//  Precondition: two student records are passed to the function by reference (must!)
int main()
{
	const int SIZE = 3;
	stuRec s[SIZE];
	for (int i = 0; i < SIZE; i++)
		fillRec(s[i]);
	cout << endl << "The three student records entered by the user are: " << endl;
	for (int i = 0; i < SIZE; i++)
		display(s[i]);
	cout << "...Sorting by Name..." << endl;
	sortByName(s, SIZE);
	for (int i = 0; i < SIZE; i++)
		display(s[i]);
	cout << endl;
	cout << "...Sorting by GPA..." << endl;
	sortByGPA(s, SIZE);
	for (int i = 0; i < SIZE; i++)
		display(s[i]);
	cout << endl;
    return 0;
}
void fillRec(stuRec &sobj)
{
	cout << "Enter name, credit, gpa: ";
	cin >> sobj.name >> sobj.credits >> sobj.gpa;
}
void display(stuRec &sobj)
{
	cout << "Name: " << sobj.name << endl;
	cout << "Credit: " << sobj.credits << endl;
	cout << "GPA: " << sobj.gpa << endl << endl;
}
void sortByName(stuRec s[], int n)
{
	for (int pass = 1; pass < n; pass++)
	{
		for (int c = 0; c < n - pass; c++)
		{
			if (s[c].name > s[c + 1].name)
			{
				swap(s[c].gpa, s[c + 1].gpa);
				swap(s[c].name, s[c + 1].name);
				swap(s[c].credits, s[c + 1].credits);
			}
		}
	}
}
void sortByGPA(stuRec s[], int n)
{
	for (int pass = 1; pass < n; pass++)
	{
		for (int c = 0; c < n - pass; c++)
		{
			if (s[c].gpa > s[c + 1].gpa)
			{
				swap(s[c].gpa, s[c + 1].gpa);
				swap(s[c].name, s[c + 1].name);
				swap(s[c].credits, s[c + 1].credits);
			}
		}
	}
}
void swap(stuRec &s1, stuRec &s2)
{
	stuRec temp = s1;
	s1 = s2;
	s2 = temp;
}